Acid-Base Balance and Arterial Blood Gases Quiz

ABGs measure blood's acid-base status, providing insights into respiratory and metabolic function.

ABG analysis typically focuses on pH, PaO2, PaCO2, and HCO3-; glucose is not directly assessed.

Arterial blood pH should fall within the narrow range of 7.35 to 7.45 for proper physiological functioning.

Respiratory acidosis involves elevated carbon dioxide (PaCO2), resulting in lowered pH and compensatory increase in bicarbonate (HCO3-).

To counter respiratory acidosis, the body boosts respiratory rate to expel excess carbon dioxide, helping restore pH balance.

The normal range for PaO2, a measure of oxygen in arterial blood, is 80 to 100 mmHg.

The Henderson-Hasselbalch equation calculates the pH of a buffer solution based on its acid and conjugate base concentrations.

Hyperventilation, leading to excessive removal of carbon dioxide, results in respiratory alkalosis with increased pH and decreased PaCO2.

Vomiting leads to loss of stomach acid (HCl), causing an increase in blood pH and bicarbonate levels, indicative of metabolic alkalosis.

Salicylate poisoning leads to increased acid production, causing metabolic acidosis with a drop in blood pH and bicarbonate levels.

Anion gap indicates the difference between positively charged cations and negatively charged anions in the blood, aiding in diagnosing acid-base disorders.

Respiratory alkalosis involves elevated pH and PaCO2, with a simultaneous decrease in bicarbonate (HCO3-), typically due to hyperventilation.

To offset metabolic acidosis, the body increases respiratory rate, facilitating removal of carbon dioxide and helping restore pH balance.

Opioid overdose can depress respiratory function, leading to elevated carbon dioxide levels, decreased pH, and respiratory acidosis.